Should a high HAS-BLED stop anticoagulation?

Not automatically. Address modifiable risks and compare with stroke risk (CHA₂DS₂-VASc).

HAS-BLED Bleeding Risk Score

Medical context

Estimate major bleeding risk in patients on anticoagulation for atrial fibrillation.

Cardiology and medicine teams use this with ECG, biomarkers, and guideline-directed therapy context.

This page explains the HAS-BLED formula, how to interpret the output, known limitations, and peer-reviewed references so you can verify results against primary sources and local protocols.

It is grouped under Cardiology because stroke prevention, acs risk, and cardiac indices.

How to use this calculator

Enter the values requested by the HAS-BLED calculator using the units shown beside each field.
Review the calculated result and read the interpretation section before acting on the output.
Check limitations and references if the result will change management, dosing, or disposition.
Use the related calculators section when you need supporting values (for example electrolytes, weight, or complementary risk scores).

Calculator

Hypertension (uncontrolled, SBP >160)

Abnormal renal function

Abnormal liver function

Stroke history

Bleeding history or predisposition

Labile INR

Elderly (age >65)

Drugs (antiplatelet / NSAID)

Alcohol excess

Result

Low bleeding risk

HAS-BLED estimates major bleeding risk on anticoagulation.

Educational use only. Confirm results with clinical judgment, primary sources, and local protocols. Not a substitute for professional medical advice. Full disclaimer.

Formula

One point each for hypertension, abnormal renal/liver function, stroke, bleeding history, labile INR, elderly, drugs, and alcohol (max 9).

Interpretation

Scores ≥3 indicate high bleeding risk and warrant caution, reversible risk-factor modification, and closer follow-up—not automatic exclusion of anticoagulation.

Limitations

Labile INR applies mainly to warfarin. DOAC-specific bleeding tools may add nuance.

Frequently asked questions

Should a high HAS-BLED stop anticoagulation?: Not automatically. Address modifiable risks and compare with stroke risk (CHA₂DS₂-VASc).
Is the HAS-BLED result enough to make a treatment decision?: No. Calculators support medical decision-making but do not replace examination, shared decision-making, institutional protocols, or consultant input when stakes are high.
Does Calcmedical store the values I type in?: Inputs are processed in your browser for this session. We do not ask for patient names or medical record numbers. See our privacy policy for hosting and analytics details.

References

Pisters R et al. HAS-BLED. Chest.